在Visual Studio中遇到IF命令的问题

Question

编程初学者和我们的文本只使用伪代码，这使得它转换为C＃是一个巨大的痛苦。特别是我在与控制台程序崩溃的问题，当谈到这个

class Program 
    {   const int pkgprice = 99;// Software package price 
     int SFTWR = 0;// number of software packages purchased 
     int Total = 0;// Total price of sale after discounts applied 

     static void Main(string[] args) 
     { 
      int SFTWR = 0;// number of software packages purchased 
      int Total = 0;// Total price of sale after discounts applied 

      {//software packages purchased 
       Console.WriteLine("How many software packages are you purchasing?"); 

       while (!int.TryParse(Console.ReadLine(), out SFTWR) || SFTWR <= 0) 
        Console.WriteLine("INVALID PLEASE ENTER A VALID NUMBER"); 

      }//end software packages purchased 

      if (SFTWR <= 9) 
      { 
       Console.WriteLine("Your total is ${}. No discounts were applied due the low volume of the order", Total = SFTWR * pkgprice); 
      } 

我注意到，当变量的数学问题是在命令崩溃。我应该引用什么，如果是的话，怎么样？

Answer 1

如果你想使用全局SFTWR和Total，你必须使你的变量static使用INT Main()：

class Program 
    { 
     const int pkgprice = 99; // Software package price 
     static int SFTWR = 0;  // number of software packages purchased 
     static int Total = 0;  // Total price of sale after discounts applied 

而改变这一行：

Console.WriteLine("Your total is ${}. No discounts were applied due the low volume of the order", Total = SFTWR * pkgprice); 

要

Console.WriteLine("Your total is ${0}. No discounts were applied due the low volume of the order", Total = SFTWR * pkgprice); 

备注：{}格式错误，使用{0}表示此格式字符串后面的第一个变量。

完成的代码如下所示：

public static partial class Program 
{ 
    const int pkgprice = 99; // Software package price 
    static int SFTWR = 0;  // number of software packages purchased 
    static int Total = 0;  // Total price of sale after discounts applied 

    static void Main() 
    { 
     {//software packages purchased 
      Console.WriteLine("How many software packages are you purchasing?"); 

      while (!int.TryParse(Console.ReadLine(), out SFTWR) || SFTWR <= 0) 
       Console.WriteLine("INVALID PLEASE ENTER A VALID NUMBER"); 

     }//end software packages purchased 

     if (SFTWR <= 9) 
     { 
      Console.WriteLine("Your total is ${0}. No discounts were applied due the low volume of the order", Total = SFTWR * pkgprice); 
     } 
    } 
}